Forouzan, Behrouz A <br/><br/>
Data communications and networking 
by Behrouz A Forouzan, Catherine Coombs and Sophia Chung Fegan 
 - 2nd Ed 
 - New Delhi  Tata McGraw Hill Publishing Company Ltd`  2003 
 - xxxii, 944p. 
<br/><br/><label>ISBN: </label>9780070499355 
<br/><br/><label>Dewey Class. No.: </label>004.6  / P013